Proper way to cut and crown
- Thread starter stang
- Start date
Chuck it in the four jaw chuck and dial it in roughly. Support the tail end with screws at the tail end of the spindle or, if the 18.5 is too short to reach through the spindle (it is for mine) use a sleeve which slides into the rear of the spindle.
Part the barrel off about 3/16 longer than finished length. Now dial the bore in precisely. Face the barrel to about 1/8 longer than finished. Re-check that the bore runs true. Now you may cut any sort of crown that appeals to you. It can be an 11 degree crown, a recessed crown, or a nicely rounded crown. To do this you will use a miniture bore/facing tool in the first two instances or a shaped tool in the third. Run at a high rpm (1200 or so). After the crown is formed, slow the lathe down then break the edge of the crown with a piloted 60 degree center reamer. That's the proper way.
If you are talking about cutting and crowning without a lathe, you whack it off at the appropriate length with a hacksaw then crown with a piloted tool you have purchased from Dave Manson or from Dave Kiff at PTG. Regards, Bill.
Part the barrel off about 3/16 longer than finished length. Now dial the bore in precisely. Face the barrel to about 1/8 longer than finished. Re-check that the bore runs true. Now you may cut any sort of crown that appeals to you. It can be an 11 degree crown, a recessed crown, or a nicely rounded crown. To do this you will use a miniture bore/facing tool in the first two instances or a shaped tool in the third. Run at a high rpm (1200 or so). After the crown is formed, slow the lathe down then break the edge of the crown with a piloted 60 degree center reamer. That's the proper way.
If you are talking about cutting and crowning without a lathe, you whack it off at the appropriate length with a hacksaw then crown with a piloted tool you have purchased from Dave Manson or from Dave Kiff at PTG. Regards, Bill.
